Geological Society. 255 



and terminating on the outer surface in nodose ends, which causes 

 a spotted appearance. 



The exceptional character of these fossils consists in their bavin* 

 the siliceous skeleton composed entirely of globates. The nearest 

 living form is Placospongia, in which both the axis and the dermal 

 crust are formed of globates with an interspace built up of nume- 

 rous pin-like spicules. Assuming the absence of pin-like spicules 

 in the Scarborough fossil, the differences are more than generic. 

 The name Eenulina, given by Blake to the globates, having been 

 preoccupied, the Author proposed that of Eha.vella for the genus, and 

 described the sponge from the Lower Calcareous Grit as It. perforata, 

 sp. n. 



December 4, 1330.— W. T. Blunford, LL.D., F.R.S., 

 President, in the Chair. 



The following communications were read : — 



1. "On Remains of Small Sauropodous Dinosaurs from the 

 Wealden." By R. Lydekker, Esq., B.A., E.G.S. 



The Author first noticed some teeth from the "Wealden of Sussex 

 and the Isle of Wight, provisionally referred by Mantell, and sub- 

 sequently by Sir R. Owen, to Hylcpasaurus, which he had made the 

 type of a species of Pleurocoehis. He then described the imperfect 

 centrum of a dorsal vertebra from the Wealden of Cuckfield, pre- 

 served in the British Museum, and a somewhat larger imperfect 

 vertebra obtained from the Wealden of Brook, Isle of Wight. 



In the absence of any evidence in favour of a contrary view, he 

 proposed provisionally to refer the vertebrae to Pleuroccelus valdensis, 

 a name which he had given to the form represented by the teeth in 

 a paper published in the ' Geological Magazine ' for the current year. 

 He stated that they afforded absolutely conclusive evidence of the 

 occurrence in the English Wealden of a diminutive Sauropodous 

 Dinosaur, which was the contemporary of the huge Hoplosaurus 

 and the still more gigantic Pelorosaurus, and that they also served 

 to increase the evidence as to the similarity of the Dinosaurian 

 fauna of the Upper Jurassic of North America to that of the 

 Upper Jurassic and Lower Cretaceous of Europe. 



2. " On a peculiar horn-like Dinosaurian Bone from the Wealden." 

 By R. Lydekker, Esq., B.A., F.G.S. 



Among a series of vertebrate remains sent from the Dorsetshire 

 County Museum to the British Museum, there is an imperfect, stout, 

 short, cone-like bone from the Wealden of Brook, Isle of Wight. 

 It appears to present a close resemblance to the horn-cores of the 

 Dinosaur described by Prof. Marsh as Geratops. 



The Author did not regard the specimen as affording conclusive 

 evidence of the existence in the Wealden of a large Dinosaur fur- 

 nished with horn-like projections on the skull like those of the Ame- 

 rican Geratops, but suggested that such might really prove to be its 

 t rue nature. 



